2027A JCMT Regular Call for Proposals

The East Asian Observatory (EAO) is pleased to announce the regular call for proposals for Semester 27A at the James Clerk Maxwell Telescope (JCMT). Please submit your proposals via the JCMT proposal handling system, Hedwig. For full details and submission instructions, please visit:   https://proposals.eaobservatory.org/jcmt/semester/31/regular   The deadline for 27A Principal… Continue reading

2026B JCMT Regular Call for Proposals

The East Asian Observatory (EAO) is pleased to announce the regular call for proposals for Semester 26B at the James Clerk Maxwell Telescope (JCMT). Please submit your proposals via the JCMT proposal handling system, Hedwig. For full details and submission instructions, please visit:   https://proposals.eaobservatory.org/jcmt/semester/30/regular   The deadline for 26B… Continue reading

Call for Proposals for Semester 2026A

We are pleased to announce that the East Asian Observatory is now accepting proposals for the Principal Investigator (PI) queue for Semester 2026A at the James Clerk Maxwell Telescope (JCMT). Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see: https://proposals.eaobservatory.org/jcmt/semester/28/regular… Continue reading

Noise Arcs in SCUBA-2 Maps

Some reductions of SCUBA-2 data exhibit arc-like structures, most often in “blank field” observations taken in good weather and at high elevation. An example reduction of a group of observations exhibiting this issue can be seen below, along with an alternative reduction where it has been suppressed by altering the… Continue reading

Users Meeting 2025

We are pleased to announce that JCMT Users meeting will be held from July 1st to July 4th, 2025, in Chiang Mai, Thailand. The meeting will consist of both talks (invited and contribution) and posters on the current progress and updates on JCMT sciences and instrumentation. We also plan to arrange hands-on tutorial sessions and lectures for JCMT observations… Continue reading

Closed Observing Proposals

Call for Proposals for Semester 2026A We are pleased to announce that the East Asian Observatory is now accepting proposals for the Principal Investigator (PI) queue for Semester 2026A at the James Clerk Maxwell Telescope (JCMT). Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and… Continue reading

JCMT Users Meeting 2024

We are happy to make the first announcement of the JCMT Users Meeting 2024. The next JCMT science/users meeting will be held from 10th May to 13th June 2023 at the Pusat Sains Negara (National Science Centre), Kuala Lumpur. You can find more details here. Continue reading

Call for proposals for semester 2024B

The East Asian Observatory is happy to invite PI observing proposals for semester 24B at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see: https://proposals.eaobservatory.org/ The 24B Call for Proposals closes on the 17th of March, 2024 (2024-03-17… Continue reading

Call for 24A

The East Asian Observatory is happy to invite PI observing proposals for semester 24A at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see: https://proposals.eaobservatory.org/ The 24A Call for Proposals closes on the 9th of September, 2023 (2023-09-10… Continue reading

Haʻaheo Family STEAM Night

On February 22nd, 2023 – Telescope System and Outreach Program Specialist, Callie Matulonis, got to share her enthusiasm and knowledge with over 75 students, teachers, and their family members at the Ha’aheo Elementary School’s Family STEAM night. Accompanied by former JCMT Extended Operator, Cameron Wipper, who is now an Astronomy… Continue reading

Call for 23B

The East Asian Observatory is happy to invite PI observing proposals for semester 23B at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see: https://proposals.eaobservatory.org/ The 23B Call for Proposals closes on the 16th of March, 2023 (2023-03-16… Continue reading

Call for Proposals 23A

23A Call is now closed The East Asian Observatory is pleased to invite PI observing proposals for semester 23A (open: September 12th 2022) at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see https://proposals.eaobservatory.org/ The 22B Call for Proposals… Continue reading

Extended Observing Returns

The EAO is pleased to have our Extended Observing program back in full swing thanks to the recruitment of two new Extended Operators, both recent graduates in Astronomy from the University of Hawai`i, Hilo. Extended Observing is when trained staff proceed with observations after the formal night shift ends. This enables… Continue reading

JCMT Astronomers find that denser and more turbulent environments tend to form multiple stars

Maunakea Hawaii – JCMT astronomers studying stellar nurseries, the birthplace of stars in our galaxy, have found that nearly  half of stars in the Galaxy are formed in binary/multiple stellar systems (think twins, triplets, quadruplets). Despite the prevalence of binary/multiple births previous studies of stellar nurseries have concentrated more on… Continue reading

Professor Richard Hills (1945-2022)

EAO/JCMT staff are deeply saddened by the loss of Professor Richard Hills (1945-2022). Professor Richard Hills of the University of Cambridge was a leading radio astronomer and instrumentalist in the era of millimeter wave and submillimeter wave astronomy.  He was the original project scientist for the JCMT and ensured the successful… Continue reading

Call for Proposals 22B

The East Asian Observatory is happy to invite PI observing proposals for semester 22B at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see https://proposals.eaobservatory.org/ The 22B Call for Proposals closes on April 1st 2022. Eligibility requirements for… Continue reading

Stardev Matched Filter Update

On July 1st, 2021 the two-component SCUBA-2 beam profile parameters were updated in accordance with the results published by Mairs et al 2021. This caused a change in the Matched Filter post-processing. When using a Stardev installation post-July 1st, 2021, executing the matched-filter method is expected to increase the measured… Continue reading

Welcoming EAO Fellow Junhao Liu

It is the observatory’s pleasure to welcome EAO Fellow Dr. Junhao Liu to the EAO/JCMT observatory team.   Junhao obtained his BSc in 2015 and PhD in 2021 from Nanjing University, and was enrolled in a long-term predoctoral fellowship program at CfA from 2018 through 2021. His research is focused… Continue reading

JCMT/SOFIA Joint Virtual Workshop: Magnetic Fields Spill Secrets Of Star Formation

“Magnetic Fields and the Structure of the Filamentary Interstellar Medium”, a JCMT and SOFIA Joint Virtual Scientific Workshop   During the period of 22nd – 25th of June, 2021, a virtual workshop on “Magnetic Fields and the Structure of the Filamentary Interstellar Medium” was held online. This workshop brought together… Continue reading

Formation of the Hub–Filament System G33.92+0.11: Local Interplay between Gravity, Velocity, and Magnetic Field

Interstellar filaments are ubiquitous in molecular clouds, and they are a key intermediate stage toward the formation of stars. Previous observations found that many stars commonly form within clustered environments associated with hub–filament systems (HFSs), where they are formed in a dense hub with numerous radial filaments extending from the… Continue reading

Pōwehi: Astronomers Image Magnetic Fields at the Edge of M87’s Black Hole

Two Hawai`i-based telescopes, the James Clerk Maxwell Telescope (JCMT), operated by the East Asian Observatory, and the Submillimeter Array (SMA), operated by the Smithsonian Astrophysical Observatory and the Academia Sinica Institute for Astronomy and Astrophysics, have once again combined efforts with the global network of telescopes known as the Event… Continue reading

Call for Proposals 21B

PLEASE NOTE THAT THIS CALL FOR PROPOSALS HAS NOW CLOSED.   The East Asian Observatory is happy to invite PI observing proposals for semester 21B at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see https://proposals.eaobservatory.org/ The 21B… Continue reading

Call for Proposals 21A

PLEASE NOTE THAT THIS CALL FOR PROPOSALS HAS NOW CLOSED. The East Asian Observatory is happy to invite PI observing proposals for semester 21A at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see https://proposals.eaobservatory.org/ The 21A Call… Continue reading

“Starspots” on Betelgeuse: JCMT Explains Star’s Record-Breaking Dimming

New data obtained using the Hawai`i-based James Clerk Maxwell Telescope (JCMT) revealed that the surface of Betelgeuse (commonly known as Orion’s shoulder), recently developed significant “Starspots” which caused an unprecedented dimming of the star. This result contrasts the previously accepted explanation that the reduction in brightness was due to a… Continue reading

On sky operations to resume

After two months of hiatus in operations, we are pleased to announce that EAO will begin preparatory work to bring JCMT to on-sky operations. This decision comes after Hawaiʻi Governor David Ige identified the Observatories as part of the state’s list of low-risk organizations and businesses that are safe to… Continue reading

The Event Horizon Telescope brings the world together to observe new mysteries in quasar 3C 279

First Event Horizon Telescope Observations of a Black-Hole Powered Jet announced as Maunakea Observatories offer MKO@Home online resources Two Hawai’i-based telescopes, the James Clerk Maxwell Telescope (JCMT), operated by the East Asian Observatory, and the Submillimeter Array (SMA), operated by the Smithsonian Astrophysical Observatory and the Academia Sinica Institute for… Continue reading

COVID-19 operational update

Once again, staff at the East Asian Observatory, send our thoughts out to our community across the world and hope you and your families are well and safe. The Governor of Hawaii has announced a ‘stay-at-home’ order for the entire State, effective from Wednesday 25th of March, through to April… Continue reading

Call for Proposals 20B

PLEASE NOTE THAT THIS CALL FOR PROPOSALS HAS NOW CLOSED. The East Asian Observatory is happy to invite PI observing proposals for semester 20B at the JCMT. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see https://proposals.eaobservatory.org/ The 20B Call… Continue reading

Special Supplementary Call for South Korea-led Proposals — 20X (in parallel with 20A)

The East Asian Observatory invites JCMT observing proposals with Principal Investigators (PIs) affiliated with a South Korean institution only for a special 20X Supplementary Call for Proposals. Proposal submission is via the JCMT proposal handling system, Hedwig. For full details, and for proposal submission, please see here. The proposal submission deadline… Continue reading

Open Enrollment Now Open

On the first of February 2020 the JCMT will allow into the JCMT queue a number of new Large Programs (alongside extension requests of existing programs). If you are interested in joining one of the new programs or programs that were approved for an extension please visit the Large Programs… Continue reading

Maunakea Wonders Teacher Workshop 2019

October 30th, 2019 kicked off the fourth “Maunakea Wonders Teacher Workshop” in collaboration with the University of Hawaii Hilo Masters of Arts in Teaching program.  The “Maunakea Wonders Teacher Workshop” program gives participants a background on the existing Maunakea Observatories, the scientific discoveries being made, the engineering/instrumentation capabilities, the jobs… Continue reading

Event Horizon Telescope Collaboration Wins 2020 Breakthrough Prize in Fundamental Physics

On Thursday, September 5th, 2019, the Event Horizon Telescope Collaboration was announced the winner of the prestigious Breakthrough Prize in Fundamental Physics. The $3 million prize, also known as the “Oscars of Science”, will be shared equally with 347 scientists co-authoring any of the six papers published by EHT. JCMT… Continue reading